source: trip-planner-front/node_modules/@angular/cdk/collections/recycle-view-repeater-strategy.d.ts@ 6a3a178

Last change on this file since 6a3a178 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

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1/**
2 * @license
3 * Copyright Google LLC All Rights Reserved.
4 *
5 * Use of this source code is governed by an MIT-style license that can be
6 * found in the LICENSE file at https://angular.io/license
7 */
8import { IterableChanges, ViewContainerRef } from '@angular/core';
9import { _ViewRepeater, _ViewRepeaterItemChanged, _ViewRepeaterItemContext, _ViewRepeaterItemContextFactory, _ViewRepeaterItemValueResolver } from './view-repeater';
10/**
11 * A repeater that caches views when they are removed from a
12 * {@link ViewContainerRef}. When new items are inserted into the container,
13 * the repeater will reuse one of the cached views instead of creating a new
14 * embedded view. Recycling cached views reduces the quantity of expensive DOM
15 * inserts.
16 *
17 * @template T The type for the embedded view's $implicit property.
18 * @template R The type for the item in each IterableDiffer change record.
19 * @template C The type for the context passed to each embedded view.
20 */
21export declare class _RecycleViewRepeaterStrategy<T, R, C extends _ViewRepeaterItemContext<T>> implements _ViewRepeater<T, R, C> {
22 /**
23 * The size of the cache used to store unused views.
24 * Setting the cache size to `0` will disable caching. Defaults to 20 views.
25 */
26 viewCacheSize: number;
27 /**
28 * View cache that stores embedded view instances that have been previously stamped out,
29 * but don't are not currently rendered. The view repeater will reuse these views rather than
30 * creating brand new ones.
31 *
32 * TODO(michaeljamesparsons) Investigate whether using a linked list would improve performance.
33 */
34 private _viewCache;
35 /** Apply changes to the DOM. */
36 applyChanges(changes: IterableChanges<R>, viewContainerRef: ViewContainerRef, itemContextFactory: _ViewRepeaterItemContextFactory<T, R, C>, itemValueResolver: _ViewRepeaterItemValueResolver<T, R>, itemViewChanged?: _ViewRepeaterItemChanged<R, C>): void;
37 detach(): void;
38 /**
39 * Inserts a view for a new item, either from the cache or by creating a new
40 * one. Returns `undefined` if the item was inserted into a cached view.
41 */
42 private _insertView;
43 /** Detaches the view at the given index and inserts into the view cache. */
44 private _detachAndCacheView;
45 /** Moves view at the previous index to the current index. */
46 private _moveView;
47 /**
48 * Cache the given detached view. If the cache is full, the view will be
49 * destroyed.
50 */
51 private _maybeCacheView;
52 /** Inserts a recycled view from the cache at the given index. */
53 private _insertViewFromCache;
54}
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